时间：2014-07-17 11:19:42 点击：次

<p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">市面上很多LED灯珠封装制程中都很容易出现胶水变黄,LED支架爬胶等,这些常见的LED情况,这些LED灯珠封装常见的故障如何去避免呢?拓展光电根据十年经验,列举了一系列的解决方法,下面是分享给LED同仁的一部分LED灯珠封装制程中胶水的解决方法。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <br /> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;color:#337FE5;">• LED黄变</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">原因:</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">1、烘烤温度过高或时间过长;</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">2、配胶比例不对,A胶多容易黄。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">解决:</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">1、AB胶在120-140度/30分钟内固化脱模,150度以上长时间烘烤易黄变。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">2、AB胶在120-130度/30-40分钟固化脱模,超过150度或长时间烘烤会黄变。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">3、做大型灯头时,要降低固化温度。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <br /> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;color:#337FE5;">• LED气泡问题</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">原因:</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">1.碗内气泡:支架蘸胶不良。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">2.支架气泡:固化温度太高,环氧固化过于激烈。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">3.裂胶、爆顶:固化时间短,环氧树脂固化不完全或不均匀。AB胶超出可使用时间。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">4.灯头表面气泡:环氧胶存在脱泡困难或用户使用真空度不够,配胶时间过长。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">解决:根据使用情况,改善工艺或与环氧供应商联系。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <br /> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;color:#337FE5;">• LED支架爬胶</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">原因:</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">1、支架表面凹凸不平產生毛細現象。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">2、AB胶中含有易挥发材料。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">解决:请与供应商联系。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <br /> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;color:#337FE5;">• LED封装短烤离模后长烤变色</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">原因:</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">1、烘箱内堆放太密集,通风不良。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">2、烘箱局部温度过高。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">3、烘箱中存在其他色污染物质。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">解决:</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">改善通风。去除色污,确认烘箱内实际温度。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <br /> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;color:#337FE5;">• 同一排支架上的灯,部分有着色现象或胶化时间不一,品质不均</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">原因:搅拌不充分。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">解决:充分搅拌均匀,尤其是容器的边角处要注意。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <br /> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;color:#337FE5;">• 不易脱模</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">原因:AB胶存在问题或胶未达固化硬度。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">解决:请与供应商联系,确认固化温度和时间。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <br /> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;color:#337FE5;">• 加同一批次同一剂量的色剂,但做出的产品颜色不一样</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">原因:色剂浓度不均;或色剂沉淀。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <strong><span style="font-size:14px;font-family:KaiTi_GB2312;">解决:色剂加温,搅拌均匀后再使用。</span></strong> </p> <p style="font-family:微软雅黑, 宋体, Arial;"> <br /> </p> <br />